Multiple-section pump-casing.



' PATENTED JAN. l, 190.7.` E. S. LE'c 5. DEGEN.

MULTIPLE SECTION .BUMP msnm.

urmonrox nun nu?. wos.'

`4 sanne-snm 1.

No; 840,137. i PATPNT'PD mm1; 19o?. x En s. LEA M. DBQPN. f MULTIPLE SECTION PUMP cAsING.

APPLIoATIoNPILnD" un 27. 1905.

4 IHREN-BBT l.

T N @@O PATENTED JAN.. '1, 1907.

4 SHEnTs-sHBET s.

No. 840,137. Y PATENTED mm1, 1907.A

- E. s. LBA a J. DEGEN.

-` MULTIPLE SECTION PUMP 0A SIN G..

LPPLIOATIOI .FILED HAY 27, 1905. .Y

4 suns-summ- 4.

UNITED sTATEs PATENT oEEioE.

EDWARD S. LEA AND JULlUS .DEGEN, OF TRENTON, NEW JERSEY,

ASSIGNORS, BY MESNE- ASSIGNMENTS, TO LEA-DEGEN PUMPy COMPANY, OF TRENTON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

specification of Letters Patent.

Patented J an. 1, 1907:

Application filed May 27,1905. Serial No. 262,609.

4To a/ZZ whom, tlm/ay concern:

Be it known that we, EDWARD S. LEA, a citizen ofY the United States, and J ULins DE- GEN, a citizen of the Republic of Switzerland,

`5l residing at Trenton, in the county of Mercer and State of New Jerseya., have invented certain new and useful Improvements in Multi- 4le-Section Pump-Casings, of which the folowing is a specification, reference being had :o to the accompanying drawings, in Which- Figure 1 is a vertical longitudinal sectional view of a pump embodying our invention. Fi P is a plan view of Fig. 1. Fig. 3 is an en elevation ofv the dpump, a portion of the casing being remove an Fig. 4 is a view of the suction end of the pump. y

' The object of our invention has been to provide a centrifugal pump-casing in which the passages leading from an impeller and the deiiectors formin such passages may be cast with such ease t at comparatively pere fect surfaces may be obtainedl and that the hiction in the pump may thereby be reduced;

and tosuch ends our invention consists in the multiple-section specified. l

In carrying our invention into practice, as illustrated in the drawings, we provide a casing 10, having bearings fora shaft 11, thatl carries one or more impellers 12.l As the' water leaves the mouth 13 of an impellerit is caught by the beak 14 of a"deiiector,the

said beak being substantially tangent to the' direction of the water in leaving the impeller, and iscarried over a artition 15l and down into the mouth 16 of the next im eller. The deiiector extends from the bea 14 to the exit 17 of the passage-wa formed between the adjacent deflectors anc between the par- ,4o tition and the casing. In 'order'that the best efficiency may be obtained, the surfaces of the defiectors 'and other parts forming the passagesfor the Water must 'be as smooth as4 possible, and to enable such surfaces to be as perfectly cast as may be-we divide the casing into segments, as illustrated in Fig;` 3, 'and provide one segment for each deiie'ctor, so that both sides of each defiector may Vbe reached laterally and a comparatively simple problem in casting be presented. The

pump casing hereinafter various casing-segments 1 8 are provided with flanges 19, by which they may be united together, as by bolts, to form a casing-section- The casing-sections formed by a complete circle of the segments are united by transverse flanges 20 so that the casing is made up of sections separated in transverse planes 21, there bein one section 4for each impeller and a suction-ead and delivery-head in each casing.

"The casingabove illustrated has the advantage that with one set of patterns pumps of any number of stages can be formed and that not more than onedeiiector is formed in an one casting, so that the surfaces of the said eflector can be most perfectly cast.

Itis obvious that our invention is a plicable to other forms of pump-casing, an we'do not desire to be limited to the precise construction illustrated. 7 o

Those features which are common to the present case and our application for the reissue of our Letters Patent No. 790,795, granted May 23, 1905, are not claimed in the present'case, but are claimed in the said re- 75 issue application. A

Having thus described this invention, We claim- 4 1. A centrifugal pump, comprising a casing, a shaft, an im eller on said shaft, a partition forming Wit the casing a chamber in which thel impeller may rotate, and delectors uniting said partition with said' casing and forming water-passages, said casing being divided into segments, there being but one seg- 8 5A ment for each`deflector.

2. A -centrlfngal pump, consisting of the combination of a casing, a shaft mounted in said casing, a plurality of impellers on said Y shaft, partitions forming with the casing 9o chambers in which the impellers may rotaie deflectors supporting said partitions from sai casing and forming terewith Water-passages, said casing being formed in segments, there' being but one segment for each deiiector,l g 5 whereby thcwaterguiding surfaces mayT be most perfectly formed. A

3. A centrifugal pump, consisting of the combination of a casing, a shaft mounted in said casing, a pluralityof impellers on said roo I shaft, partitions forming dii'ded Hsubstantially parallel to the EDWARD S. LEA. v JULIUS DEGEN. Witnesses as to Edward S. Lea HARRY ETHERALD, FRED; W. BARNAULO. -Witnesses as to Julius Degen:

EMIL DIETLER, JOHN O. SEIFERT. y

with the casing chambers in which tbe im ellers may rotateh deflectors supporting said partitions from said casing and forming therewith Waterpassages, said easing consisting' of sections meeting in planes substantially perpendicular to its axis, each of said sections being 'divided along'substantlally radial planes into Segments, there being but one segment for each deector, land said-'casing as la Whole bein shale?. 

